JP2606611Y2 - Power work vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION In the present invention, a prime mover and a boarding operation unit are arranged on a body supported by a pair of left and right front wheels and a rear wheel, and a hitch for mounting a working machine is provided at a rear part of the body. Related to powered work vehicles.

[0002]

2. Description of the Related Art A power working vehicle as described above is widely known as an agricultural tractor or the like. In the conventional power working vehicle, a prime mover is mounted on a front end of a vehicle body supported by a pair of left and right front wheels and a rear wheel. In addition, a traveling body is constructed by arranging a boarding operation unit consisting of a steering device and seats in the rear direction from the prime mover, and a work machine is detachably attached to the tail of the traveling body via a three-point link mechanism It is configured to be.

[0003]

[Problems to be solved by the invention] Conventional power work vehicles
A prime mover is mounted on the front end of the vehicle body, and a work machine is mounted on the rear part of the vehicle body by a three-point link mechanism, so that the overall front and rear length including the work machine is increased, so that the axle distance is increased and the front over is increased. Since both the hang and the rear-over hang are large and the turning direction is not good, there is a problem that work cannot be performed smoothly and efficiently in a small field. An object of the present invention is to provide a power work vehicle that can solve this problem.

[0004]

According to the present invention, a pair of left and right rear wheels (9) are supported by a pair of left and right front wheels (9) and (9) and a rear axle case (6). The front wheels (9) and (9) are steered to the front end of the body (1) supported by (8) and (8).
A steering column equipped with a steering handle (10) to be erected and a seat (3) opposite to the steering column (10) to form a riding operation unit (2), which is located behind the steering column of the riding operation unit (2). a power working vehicle that drives a work machine (14) for mounting through the hitch (28) and aft body to the rear wheel (8) (8) by a prime mover (4) to be mounted on said working machine ( Move to 14)
Lateral view of the input shaft (20) of the horizontal horizontal shaft for transmitting force
Behind the rear axle case (6) within the contours of the wheels (8) (8)
It is arranged in the vicinity and is coaxial with the axis of the input shaft (20).
A work machine connecting body (16) that rotates up and down around the center of rotation of
Install the hitch (28) at the rear end,
The lifting cylinder (1) is directly connected between (16) and the airframe (1).
8), the extension / retraction operation of the lift cylinder (18)
The hitch (28) at the rear end of the working machine linked body (16)
Moves up and down along the rear edge of the rear wheels (8) and (8)
This is a power work vehicle characterized by the above.

Further, in the produced power working vehicle as described above, work machine connection body (16) and the machine body (1) directly between
The lifting cylinder (18) interposed is always the rear wheel in side view.
(8) The power working vehicle is provided within the contour of (8) so as to extend and contract .

[0006]

[Effects of the Invention] According to the present invention , the steering collapsing is provided at the front end of the fuselage.
And a prime mover behind the control column
The body configuration and the rear axle
− Centering on the axis of the input shaft located near the rear side of the
A hitch is provided at the rear end of the vertically-rotated
Switch is directly interposed between the work unit and the machine
Rear edge of the rear wheel in side view due to the expansion and contraction of the cylinder
Work equipment mounting configuration that moves up and down along the vicinity
In combination , the front and rear length of the body including the working machine is shortened, so that the wheelbase is shortened, and the front overhang,
The rear overhang can be supported with good stability while reducing the size of the rear overhang, so that the whole machine can be made compact and small turning performance can be improved, so that work can be performed smoothly and efficiently even in a small field.

A steering column is disposed at the front end of the fuselage to form a boarding operation section, so that visibility is good and the steering is easy, and a work machine mounting section at the rear of the body is provided.
Since the hitch for attaching the work machine is compact near the outer edge of the rear wheel, it is easy to attach and detach the work machine to the hitch .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a power work vehicle is a tractor will be described below with reference to the drawings. The tractor has a steering column provided with a steering handle (10) at the front end of the body (1). With a seat behind it
(3) is oppositely arranged to form a boarding operation section (2), and a motor (4) is arranged below the seat (3) behind the steering column section, and a motor (4) is provided at the rear of the motor (4). The transmission case (5) is arranged via a clutch unit. And
Left and right rear axles (7) project from left and right sides of the transmission case (5) via rear axle cases (6), and rear wheels (8) rotate on each axle (7). The left and right front wheels (9) are arranged at the front lower part of the body (1), and the front wheels
Steering is performed by interlocking the steering handle (10) with (9). Numerals (12) and (13) denote fuel tanks and mufflers which are attached to the prime mover (4), which are arranged at predetermined positions above the rear axle case (6). .

A work machine (14) is connected to the rear end of the tractor body (1) as described above.
The power from the prime mover (4) is transmitted to (14) and
4) is driven to perform tillage work and the like. In this embodiment, as shown in FIG. 1, the rear axle case of the tractor (1) is used.
The stay (15) protrudes rearward from (6), and the stay (15)
The work machine connected body (16) is mounted on the work machine (16), and the front end of the work machine (14) is mounted on a hitch (28) provided at the rear end of the work machine connected body (16).

The mission case of the tractor (1)
The front end is attached to (5), and the rear end of the lifting / lowering cylinder (18) that expands and contracts within the projected area of the rear wheel (8) in a side view (hereinafter referred to as the outline of the rear wheel 8) is attached to the working machine. Connection
(16), and by the expansion and contraction of the lifting cylinder (18), the working machine connected body (16) is within the contour of the rear wheel (8) in the side view and near the rear side of the rear axle case (6). The work machine (14) mounted on the hitch (28) is raised and lowered by rotating vertically about a horizontal and horizontal rotation axis located at the part . In addition, the hitch (28) part is a working machine connected body (16).
With the vertical rotation of the rear wheel (8), it moves up and down along the vicinity of the outer edge of the rear wheel (8) in a side view.

Further, a gear box is provided in the working machine connected body (16), and the working machine connected body is provided in the gear box portion.
An input shaft (20) whose axis coincides with the rotation axis of (16) is provided. Then, a belt (22) is wound around an input pulley (19) provided at one shaft end of the input shaft (20) and an output pulley (21) interlocked with the motor (4) to thereby input the input shaft. A transmission for transmitting power to (20) is configured.

Next, the working machine (14) will be described. As shown in FIGS. 1 and 2, a transmission case is provided at the shaft end of the input shaft (20) on the side opposite to the input pull (19). (2
3) are operatively connected to each other, and a tilling case (24) interlocking with the rear end side of the transmission case (23) is hung down to cultivate the cultivating case.
A tillage claw (25) is rotatably mounted on the lower end of (24). In addition, on the upper part of the tilling case (24),
Attach (26) and tail ring on the back of the tillage cover (26)
(27) is attached.

The structure for attaching the working machine (14) to the hitch (28) will be described in detail. As shown in FIG. 3, a hitch (29) corresponding to the hitch (28) on the body side is attached to the working machine (14). At the front end of the left and right pins (3)
1) and fix the left and right pins (31) with the hitch (2
The two hitches (28) and (29) are joined by fitting into the left and right connecting grooves (30) formed on the upper part of 8), and the connecting pins (32) are inserted into the two hitches so as to be connected. ing.

The work machine (14) placed on the ground is
(1) When connecting to the rear part, the right and left pins (31) on the working machine side are fitted into the connecting grooves (30) of the hitch (28) on the machine body side, and at this time, the connection is made by the lifting cylinder (18). Department (1
7) Lift the work machine (1) around the left and right pins (31).
By rotating 4), the two hitches 28 and 29 are joined.

[Brief description of the drawings]

FIG. 1 is an overall side view of a power work vehicle according to the present invention.

FIG. 2 is a plan view of the power work vehicle.

FIG. 3 is an enlarged side view showing a connection structure of the working machine.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 body 4 motor 5 transmission case 6 rear axle case 7 rear axle 8 rear wheel 9 front wheel 12 fuel tank 13 muffler 14 work machine 16 work machine connection body 18 lifting cylinder 28 hitch on body side

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01B 59/042 A01B 63/10 A01B 71/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A pair of left and right front wheels (9) and (9) and a rear axle case.
A steering handle for steering the front wheels (9) and (9) at the front end of the body (1) supported by a pair of left and right rear wheels (8) and (8) pivotally supported by (6). An operation column with (10) standing upright and a seat (3) opposite to the control column
Task (2) composition, and the mounting through the rear wheel by a prime mover (4) to be mounted to the rear position from the steering column of the driver's section (2) (8) (8) and the hitch on the aft body (28) A power working vehicle for driving the working machine (14), wherein the working machine (14)
Rear view the input shaft (20) of the horizontal horizontal shaft to be transmitted.
Near the rear side of the rear axle case (6) within the contour of the wheel (8) (8)
Around the input shaft (20)
And a work machine connecting body (16) that rotates up and down
The hitch (28) is installed in the
The lifting cylinder (18) is directly interposed between the body (1)
The working machine is extended and retracted by the elevating cylinder (18).
The hitch (28) at the rear end of the connecting body (16) is the rear wheel (8) in side view.
(8) A power working vehicle characterized by moving up and down along the vicinity of the rear side peripheral edge . 2. A direct connection between the working machine connecting body (16) and the machine body (1).
The lifting cylinder (18) interposed in the rear car is always
It is located within the contour of the ring (8) (8) so that it can extend and contract.
The powered work vehicle according to claim 1 .